“Reports of my death are greatly exaggerated.” - Intel
45 years at the front of the pack is a damn good run. Remember Motorola (6800, 68000)? MOS Technology (6502)? Zilog (Z80, Z8000)? TI? Signetics? IBM? Most of them aren't in business or at least not in the CPU business any more.
The ARM RISC approach was a winner from the get-go but it took a long time to break out of the embedded-CPU market. Now it's gonna fly.
Big servers will be running Intel Xeons for a good long time, but the rest of the market has already made the decision to migrate.